/Engine/Plugins/Experimental/PCG/Source/PCG/Public/Elements/PCGSurfaceSampler.h
Returns true if InPin is in use by node (assuming node enabled). Can be used to communicate when a pin is not in use to user.
virtual bool IsPinUsedByNodeExecution ( const [UPCGPin](API\Plugins\PCG\UPCGPin) * InPin ) const